Overview
ABSTRACT
Microwave techniques for the electromagnetic characterisation of materials are described. This article is intended primarily as a guide for readers: it outlines the foundations and theory of wave / matter interaction, measurement techniques and related instrumentation. The measurement methods are illustrated by applied examples.
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Kamel HADDADI : Senior Lecturer - University of Lille – Sciences et Technologies - Institute of Electronics, Microelectronics and Nanotechnology, UMR CNRS 8520, Villeneuve d'Ascq, France
INTRODUCTION
Microwave electromagnetic characterization techniques have been used in research laboratories and industry for decades. The penetration of these methods in sectors as varied as electronics, aeronautics, civil engineering, chemistry and biology can be explained by the need to accurately characterize materials. These measurements tell us a great deal about a material's health. The electromagnetic characteristics of materials are also essential for designing systems.
This work is intended as a synthesis article, covering the essentials of wave/matter interaction theory, electromagnetic characterization techniques and associated instrumentation. The article is intended as a guide for the reader, enabling him or her to select the technique and associated instrumentation best suited to the application in question.
The electromagnetic properties of materials are presented first. Microwave measurement systems are presented in the second part. Electromagnetic characterization techniques are described in the final section. The formulation of the direct problem and the method for dealing with the inverse problem are developed for each of the measurement techniques.
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KEYWORDS
non destructive testing (NDT) | dielectric properties | Electromagnetic characterization | complex permittivity | complex permeability | vector network analyzer | six-port technology
Microwave measurement of electromagnetic material properties
Electromagnetic properties of materials
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